Mis-matched modulation-demodulation format selectable filters

a filter and modulation technology, applied in the field of bit rate agile (bra) signal processors, can solve the problems of inability to introduce band-pass filtering, inability to achieve band-pass filtering, and expensive linear receivers with linear automatic gain control circuits. achieve significant spectral saving advantages and robust performan
US7415066B2Inactive Publication Date: 2008-08-19FEHER KAMILO
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Patent Information

Authority / Receiving Office
US ¡ United States
Patent Type
Patents(United States)
Current Assignee / Owner
FEHER KAMILO
Publication Date
2008-08-19
Estimated Expiration
Not applicable ¡ inactive patent

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Abstract

Modulation-demodulation format selectable (MFS) processor, cross-correlator and transmit filter for processing, cross-correlating and filtering in-phase and quadrature-phase baseband signal and providing a first bit rate and a second bit rate baseband signal to a modulator and a transmitter for modulation and transmission of the processed filtered baseband signal. Transmit amplifier operated in a first radio frequency (RF) band for amplification of the first bit rate modulated signal and a second RF amplifier operated in a second RF band for amplification of the second bit rate modulated signal. Switch for selecting the first or the second bit rate or first or second modulation format signal and providing selected signal to a transmitter. Receiver for receiving transmitted signal. Demodulator and demodulator filter mis-matched to transmit baseband filter. Receive processor for receiving and processing quadrature demodulator demodulated baseband filtered signal and for providing first and second format cross-correlated in-phase and quadrature-phase baseband signal. Time division multiplex (TDM) and Orthogonal Frequency Division Multiplex (OFDM) processor and transmit baseband filter for processing, filtering and providing TDM and OFDM processed and filtered signal to a modulator, transmitter and receiver. Receiver and demodulator for demodulating and baseband filtering received modulated TDM signal. Demodulator of TDM signal has a demodulator baseband filter which is mis-matched to the transmit baseband filter and provides demodulated baseband mis-matched filtered cross-correlated in-phase and quadrature-phase signal.
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Description

RELATED APPLICATIONS

[0001] This Application is a Continuation Application of U.S. patent application Ser. No. 10 / 831,562, filed on Apr. 23, 2004 which is a continuation Application of U.S. patent application Ser. No. 09 / 370,362, filed on Aug. 9, 1999, now U.S. Pat. No. 6,757,334 and claims the benefit of the aforementioned applications. Related patent Applications, issued patents and other publications and references are also incorporated herein as listed in the Attached Supplemental Information Disclosure (SID) and attached to the SID.

[0002] This application claims the benefit under 35 U.S.C. 119(e) of United States Provisional Patent Application Ser. No. 60 / 095,943 entitled “FQPSK TRANSCEIVERS” filed 10 Aug. 1998 [PP3]; and incorporated herein by reference.

[0003] Other related United States Patent Applications are co-pending United States Utility Patent Application Ser. No. 09 / 111,723 [PP1] filed 8 Jul. 1998 and entitled “FMOD TRANSCEIVERS INCLUDING CONTINUOUS AND BURST OPERATED TDMA...

Claims

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